Shiny White Rocks & Minerals
A shiny white rock is one of the most common identification questions. The shine is the first clue: 7 of the 53 candidates below have a true metallic luster (Arsenopyrite, Bismuth, and Cobaltite), while 32 are glassy like broken bottle glass (Opal, Moonstone, and Marble).
Metallic-looking stones are usually sulfides, oxides or native metals and feel heavy; glassy ones are typically silicates, quartz varieties or volcanic glass. Hardness and streak settle most cases.
Metallic shiny white rocks (7)
Glassy shiny white rocks (32)
Waxy, silky or pearly shiny white rocks (14)
Frequently asked questions
Is my shiny white rock a meteorite?
Almost never. Meteorites are rare, heavy, magnetic and usually have a dull dark fusion crust rather than a bright shine. Shiny white finds are far more likely to be Marble, Opalite, and Dendritic Agate.
How can I tell a metallic rock from a glassy one?
Metallic luster reflects light like polished metal and the stone is opaque even at thin edges; glassy (vitreous) luster looks like glass and thin edges often let light through. Metallic minerals also tend to leave a colored streak on unglazed porcelain.
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